Written by cpm
Whether it’s to gauge for herbicide resistance or crop nutrition, now’s the time to gather seeds for testing. CPM reports. The first step in blackgrass control is to know what you’re dealing with. By Tom Allen-Stevens and Rob Jones As harvest gets underway – somewhat earlier than usual for many – growers have been encouraged to assess blackgrass for resistance and start autumn fieldwork, even before the combine header is lowered into the crop. Herbicide resistance in blackgrass continues its relentless rise, and according to the Blackgrass Resistance Initiative (BGRI) now costs UK growers £400M/yr in lost gross profit and 0.8M tonnes of lost wheat yield. “Every time you use a herbicide you select for resistance,” notes Dr Sarah Cook of ADAS. “Unless you have a zero-tolerance policy, you will be driving up levels of resistance. Coupled with the demise of oilseed rape, meaning a reduction in the break-crop area, this is not a good picture.” Hold off on spraying until two thirds of seeds in the part of the canopy carrying the lion’s share of the yield change from green to brown.©Tim Scrivener Photographer 07850 303986….Covering Agriculture In The UK. She urges growers not to “go into denial”…
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